I imagine that would happen, but as soon as the size of their economy was large enough to attract the notice of the Hyperclass, or even just one member, it would be completely undercut by them. I don't know what an equilibrium state would look like.
I beleive that technology would still drip, if not flow from the elite world to the outsiders, and eventually they yould maybe leave the planet, for example, and leave the elites in their world, something like in Asimov's tales where the solarians and auroreans lived comfortably with their robotic servants and autofactories happily ever after, until extinction.
